Lock



Patented Dec. 22, 1925.

UNITED STATES ias-sam PATENT OFFICE.

LEE D. GIBSON, 0F DALLAS, TEXAS.

LOCK.

Application led October 3i, 1924. Serial No. 747,108.

To all whom t 'may concern.'

Be it known that I, LEE D. GIBSON, a citizen of the United States,residing at Dallas, in the county of Dallas and State of Texas, haveinvented certain new and useful Improve-ments in Locks, of whichthefollowing is a specification.

This invention relates to locks, and is anV A further object of theinventionis thev provision of a lock construction in wh1ch the n lockcasing is provided with a number of compartments, the plungers arranged1n one compartment and the key adapted to be received in anothercompartment whereby opening of the lock by jimmying the key isprevented.

A further object of the invention is the provision of a lock in vwhichthe locking plungers are actuated by a pair of pivoted dogs and areretained in ylocked position by a locking member, the dogs and thelocking member being controlled by a single key.

In the accompanying drawings, I have shown one 'embodiment of theinvention. In this showing: ,A

Figure 1 is a front elevation of the lock, parts being shown in section,

Figure 2 is a horizontal sectional viewon line 2 2 of Figure 1,

Figure 3 is a similar view on line 3 3 of Figure 1.

Figure 4 is a similar view on line 4 4 `of Figure 1,

Figure 5 is a vertical sectional view on line 5 5 of Figure 1,

Figure 6 is a detail view of portions of the lock disassembled, and,

Figure 7 is a perspective view of the pivl oted dogs.

Referring to the drawings, the yreference numeral 1 designates generallyla lock casing which may be of any desired form and which is shownrectangular. The casing is formed of a block of metal which is cut outto form the various compartments of the lock and to provide partitionwalls separating the compartments. As shown, the casing is provided witha wall 2 parallel to one side, and spaced a slight distance there-,tromtforrnrlg .a .Qhamber 3 for .the recepf tion ofone arm of the hasp.It is further provided with a transverse partition 4, forming acompartment 5 for the reception of the key and the key mechanism. Abovethe partition 4, there is provided a compartment 6, which isseparatedfrom an upper compartment by means of a transverse wall 7. Thecompartment 5 is spaced from the hasp chamber by means of a verticalwall 8 extending from the bottom of the lock casing tothe partitionywall 4 and a casing 9 is arranged within this space. After the variousparts of the lock have been assembled in the casing, a plate 10 isarranged over the `open face vof the casing and immovably securedthereto in any suitable Y manner, as by welding or the like.

The lock is'adapted to receive a hasp 10 which is formed U-shaped inthe. usual manner and one arm 12 thereof is elongated and extends intothe chamber 3 to a point adjacent the bottom of the lock casing. Theother arm 13 is shorter and is adapted to barely enter the top of thelock casing when in locked position. The long arm 12 is provided with areduced lower end 14, and a coil spring 15' is arranged around thisreducedportion in the' bottom of the chamber 3 and is adapted to projectthe hasp when the lock is released. As shown, a knob 16 may be formed inthe bottom of the chamber 3 and receive the end of the spring to guideit. In Figure 1 it will be seen that the casing 1 is extended up intothe curve of the hasp 11 atla and leaving an opening 2a'for a staple orthe liketo fasten the lock to the article to be secured. The purpose ofthis extension is to prevent the prying of the lock by inserting apointed instrument between the hasp and the casing. The arms of the haspare provided with substantially V-shaped notches or recesses 17 inalinement with each other and these recesses are adapted to receive theends vof locking plungers 18, which retain the lock in closed position.As shown, the plungers are arranged in a compartment formed between thetop of the lock casing and the partition wall 7. A coil spring 19 isarranged between the plungers and normally forces them outwardly.

The plungers are adapted to be actuated by means of a pair of pivoteddogs 2O which are arranged in the compartment 6 and are pivotallymounted .on pins 2l which are received in a ,transverse rib 22. The.Upper ends of these pins extend `through an elongated slot in the walli and are received in not hes 23 formed in the lowerI tace of theplungers, These dogs are adapted to be i. tnated by a cani 24k arrangedon the end ot a rod which extends through thc partition at. The roe iscarried by a cylinder 2G, the lower end ot which is provided with anenlargement 2.7 abutting the inner et the bottom ot the loch casing.rlhe loch casing is provided with an opening in ali-nement with thecylinder, and a tubular spacing member 28 is secured to the cylinder andextends through this opening. Exteriorly or the casing, the tubularspacing member is provided with an enlargement 29 similar to theenlargement 27. The cylinder is provided with a groove 30 which, asshown, may be spirally arranged and is adapted to receive a lrey 3lwhich is twisted to lit in this groove. The partition 8, which iiormsone of the walls ot the casing 9, is provided with spaced cut outportions or notches A locking plunger 33 is arranged within this casingand is normally iorced outwardly by vmeans of a spring 34. This plungeris provided with a pair of grooves 35 in the tace adjacent the wall 8and these grooves extend across the tace' et the plunger at an angle seeFigure 5). The key 31 is provided with ribs or extensions' which areadapted to pass through the notches 32 and enter the grooves 35. rThelocking plunger is provided with an extension 37 which is reduced incross section and extends through the compartment 6. The partition 'i'provided vwith an opening through which the end of the loching plunger33 is adapted to pass and the locking plunger i8 is provided with a slotor notch 38 in alinement therewith when t-he plunger is in operativeposi-tion to receive the end oi the plunger 33. Adjacent the end or theplunger, there is provided anenlargement forming a shoulder 39, which isadapted to Contact .rith the lower Lt'ace ot the parti-tion 7.

in operation, the hey is inserted in the cylinder 26 from the bottom ofthe loclr casing and rides in the groove 30. rll`he lingers project fromthe cylinder.` rihe cylinder then rotated by turning the hea-d of thekey and the lower linger 36 iirst enters the lower groove through theslot '32. As

' the hey is rotated, this moves the plunger downwardly.

After a slight further rotation, the upper linger enters the uppergroove and the continued rotation of the hey draws the member 83inwardly, releasmg its upper end 'from the notch 38. At the same' time,the dogs 2O are swung on their `pivots by the cam 2li, the lower end ofthe being forced outwardly and the upper ends moving toward each other.This inward movement ont the dogs withdraws the locking plungers 18 fromI:the rel? in the hasp and placesthe spring l) under tension. The springl5 then projects the hasp and when the short arm l?) is projected, it isarranged above the top ot the casing and the loch is unlocked. Willenthe key is turned through a complete halt revolution and withdrawn l'romthe cylinder, the parts are reaey to assume an operative position and assoon as the hasp is Yforced-i home, the spring 19 returns the `lockingplungers l5 to their operative position. the saine time, the lockingmember 33 s forced upwardly by the spring 34 andv when the plungers 18Aassume their yoperative position, the upper end of the member 33 entersthe notch 88.

it is to be understood Athat the form of my invention herewith shownandidescribed is to be taken as a preferred example of the sa ie, andthat various changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit et the invention or the.scope of the'sub-v joined claims.

l claim:

l. A lock as described and shown comprising a casingy a major 'lockingyplunger and minor locking plungers therein, -a spiral key with lingersen gageable in slots in said maj or locking plunger for moving lsaidmajor plunger downward from engagement with one ot' said minor lockingplungers; and means for releasing said minor locking plnngers troniengagement with the hasp lwhen the key is rot-ated to move vthe majorplunger.v

Q. A lock described and shown, coinprising a casing, a slotted cylinderwith a spiral key with lingers, the latter engageable in obliquelydisposed. slots in a major plunger to pull it downward on rotation ofthe key; minor plungers engageable with said hasp, dogs for moving theminor plungers from said enga-gement when the major plunger is moveddownward, and means for lprojecting the minor plungers to lockedposition.

3. A. loclr or' the character described comprising a casing, a haspsecured therein, minor locking plungers :tor engagement with said hasp,a vertically movable l-i-najor locking plunger adapted to engageV oneot' said minor locking plungers for retaining the latter in engagementwith the hasp, a vertically extending key cylinder rotatably mountedwithin said casing, vmeans operatively connecting the upper end or saidcylinder with said minor locking plungers -whereby the latter may bemoved out of engagement with the hasps upon rotation of said cylinder,and the key for said cylinder adapted to engage said major lockingplunger for j withdrawing the latter from engagement with one of saidminor locking piangeren 1,566,473 p v a 4. A lock of the characterdescribed comprising a casing, a hasp secured Within said casing,partitions formed with said casing for dividing the same into aplurality of compartments, minor locking plungers mounted Within one ofsaid compartments, a major locking plunger mounted Within anothercompartment, the upper end of said major locking plunger adapted toproject at times Within the minor locking plungers compartment forengagement with one of said minor locking plungers, dogs pivotallysupported in another compartment of said casing and adapted to extendWithin the minor locking plungers compartment for engagement with saidplungers, a key cylinder arranged in another compartment, a cam carriedby said cylinder and arranged in said dogs compartment for engagementthere- With, and a key for said cylinder adapted to extend at timesWithin said maior locking plunger compartment for engagement with saidmajor locking plunger.

In testimony whereof, y I aix my signature.

LEE D. GIBSON.

